From d658f8a0e63b6476148162aa7a3ffffc58dcad52 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 13 Apr 2010 05:03:20 +0000 Subject: [PATCH] ipv4: ipmr: remove net pointer from struct mfc_cache Now that cache entries in unres_queue don't need to be distinguished by their network namespace pointer anymore, we can remove it from struct mfc_cache add pass the namespace as function argument to the functions that need it. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- include/linux/mroute.h | 15 ---------- net/ipv4/ipmr.c | 65 +++++++++++++++++++++--------------------- 2 files changed, 32 insertions(+), 48 deletions(-) diff --git a/include/linux/mroute.h b/include/linux/mroute.h index c5f3d53548e..de7780a6dd3 100644 --- a/include/linux/mroute.h +++ b/include/linux/mroute.h @@ -192,9 +192,6 @@ struct vif_device { struct mfc_cache { struct mfc_cache *next; /* Next entry on cache line */ -#ifdef CONFIG_NET_NS - struct net *mfc_net; -#endif __be32 mfc_mcastgrp; /* Group the entry belongs to */ __be32 mfc_origin; /* Source of packet */ vifi_t mfc_parent; /* Source interface */ @@ -217,18 +214,6 @@ struct mfc_cache { } mfc_un; }; -static inline -struct net *mfc_net(const struct mfc_cache *mfc) -{ - return read_pnet(&mfc->mfc_net); -} - -static inline -void mfc_net_set(struct mfc_cache *mfc, struct net *net) -{ - write_pnet(&mfc->mfc_net, hold_net(net)); -} - #define MFC_STATIC 1 #define MFC_NOTIFY 2 diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index d6aa65e2b08..f8e25c8ba07 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -93,10 +93,12 @@ static DEFINE_SPINLOCK(mfc_unres_lock); static struct kmem_cache *mrt_cachep __read_mostly; -static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local); +static int ip_mr_forward(struct net *net, struct sk_buff *skb, + struct mfc_cache *cache, int local); static int ipmr_cache_report(struct net *net, struct sk_buff *pkt, vifi_t vifi, int assert); -static int ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm); +static int ipmr_fill_mroute(struct net *net, struct sk_buff *skb, + struct mfc_cache *c, struct rtmsg *rtm); /* Service routines creating virtual interfaces: DVMRP tunnels and PIMREG */ @@ -325,7 +327,6 @@ static int vif_delete(struct net *net, int vifi, int notify, static inline void ipmr_cache_free(struct mfc_cache *c) { - release_net(mfc_net(c)); kmem_cache_free(mrt_cachep, c); } @@ -333,11 +334,10 @@ static inline void ipmr_cache_free(struct mfc_cache *c) and reporting error to netlink readers. */ -static void ipmr_destroy_unres(struct mfc_cache *c) +static void ipmr_destroy_unres(struct net *net, struct mfc_cache *c) { struct sk_buff *skb; struct nlmsgerr *e; - struct net *net = mfc_net(c); atomic_dec(&net->ipv4.cache_resolve_queue_len); @@ -392,7 +392,7 @@ static void ipmr_expire_process(unsigned long arg) *cp = c->next; - ipmr_destroy_unres(c); + ipmr_destroy_unres(net, c); } if (net->ipv4.mfc_unres_queue != NULL) @@ -404,10 +404,10 @@ out: /* Fill oifs list. It is called under write locked mrt_lock. */ -static void ipmr_update_thresholds(struct mfc_cache *cache, unsigned char *ttls) +static void ipmr_update_thresholds(struct net *net, struct mfc_cache *cache, + unsigned char *ttls) { int vifi; - struct net *net = mfc_net(cache); cache->mfc_un.res.minvif = MAXVIFS; cache->mfc_un.res.maxvif = 0; @@ -547,24 +547,22 @@ static struct mfc_cache *ipmr_cache_find(struct net *net, /* * Allocate a multicast cache entry */ -static struct mfc_cache *ipmr_cache_alloc(struct net *net) +static struct mfc_cache *ipmr_cache_alloc(void) { struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); if (c == NULL) return NULL; c->mfc_un.res.minvif = MAXVIFS; - mfc_net_set(c, net); return c; } -static struct mfc_cache *ipmr_cache_alloc_unres(struct net *net) +static struct mfc_cache *ipmr_cache_alloc_unres(void) { struct mfc_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); if (c == NULL) return NULL; skb_queue_head_init(&c->mfc_un.unres.unresolved); c->mfc_un.unres.expires = jiffies + 10*HZ; - mfc_net_set(c, net); return c; } @@ -572,7 +570,8 @@ static struct mfc_cache *ipmr_cache_alloc_unres(struct net *net) * A cache entry has gone into a resolved state from queued */ -static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) +static void ipmr_cache_resolve(struct net *net, struct mfc_cache *uc, + struct mfc_cache *c) { struct sk_buff *skb; struct nlmsgerr *e; @@ -585,7 +584,7 @@ static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) if (ip_hdr(skb)->version == 0) { struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct iphdr)); - if (ipmr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) { + if (ipmr_fill_mroute(net, skb, c, NLMSG_DATA(nlh)) > 0) { nlh->nlmsg_len = (skb_tail_pointer(skb) - (u8 *)nlh); } else { @@ -597,9 +596,9 @@ static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) memset(&e->msg, 0, sizeof(e->msg)); } - rtnl_unicast(skb, mfc_net(c), NETLINK_CB(skb).pid); + rtnl_unicast(skb, net, NETLINK_CB(skb).pid); } else - ip_mr_forward(skb, c, 0); + ip_mr_forward(net, skb, c, 0); } } @@ -717,7 +716,7 @@ ipmr_cache_unresolved(struct net *net, vifi_t vifi, struct sk_buff *skb) */ if (atomic_read(&net->ipv4.cache_resolve_queue_len) >= 10 || - (c = ipmr_cache_alloc_unres(net)) == NULL) { + (c = ipmr_cache_alloc_unres()) == NULL) { spin_unlock_bh(&mfc_unres_lock); kfree_skb(skb); @@ -814,7 +813,7 @@ static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock) if (c != NULL) { write_lock_bh(&mrt_lock); c->mfc_parent = mfc->mfcc_parent; - ipmr_update_thresholds(c, mfc->mfcc_ttls); + ipmr_update_thresholds(net, c, mfc->mfcc_ttls); if (!mrtsock) c->mfc_flags |= MFC_STATIC; write_unlock_bh(&mrt_lock); @@ -824,14 +823,14 @@ static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock) if (!ipv4_is_multicast(mfc->mfcc_mcastgrp.s_addr)) return -EINVAL; - c = ipmr_cache_alloc(net); + c = ipmr_cache_alloc(); if (c == NULL) return -ENOMEM; c->mfc_origin = mfc->mfcc_origin.s_addr; c->mfc_mcastgrp = mfc->mfcc_mcastgrp.s_addr; c->mfc_parent = mfc->mfcc_parent; - ipmr_update_thresholds(c, mfc->mfcc_ttls); + ipmr_update_thresholds(net, c, mfc->mfcc_ttls); if (!mrtsock) c->mfc_flags |= MFC_STATIC; @@ -859,7 +858,7 @@ static int ipmr_mfc_add(struct net *net, struct mfcctl *mfc, int mrtsock) spin_unlock_bh(&mfc_unres_lock); if (uc) { - ipmr_cache_resolve(uc, c); + ipmr_cache_resolve(net, uc, c); ipmr_cache_free(uc); } return 0; @@ -910,7 +909,7 @@ static void mroute_clean_tables(struct net *net) cp = &net->ipv4.mfc_unres_queue; while ((c = *cp) != NULL) { *cp = c->next; - ipmr_destroy_unres(c); + ipmr_destroy_unres(net, c); } spin_unlock_bh(&mfc_unres_lock); } @@ -1221,9 +1220,9 @@ static inline int ipmr_forward_finish(struct sk_buff *skb) * Processing handlers for ipmr_forward */ -static void ipmr_queue_xmit(struct sk_buff *skb, struct mfc_cache *c, int vifi) +static void ipmr_queue_xmit(struct net *net, struct sk_buff *skb, + struct mfc_cache *c, int vifi) { - struct net *net = mfc_net(c); const struct iphdr *iph = ip_hdr(skb); struct vif_device *vif = &net->ipv4.vif_table[vifi]; struct net_device *dev; @@ -1335,11 +1334,11 @@ static int ipmr_find_vif(struct net_device *dev) /* "local" means that we should preserve one skb (for local delivery) */ -static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local) +static int ip_mr_forward(struct net *net, struct sk_buff *skb, + struct mfc_cache *cache, int local) { int psend = -1; int vif, ct; - struct net *net = mfc_net(cache); vif = cache->mfc_parent; cache->mfc_un.res.pkt++; @@ -1396,7 +1395,7 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local if (psend != -1) { struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) - ipmr_queue_xmit(skb2, cache, psend); + ipmr_queue_xmit(net, skb2, cache, psend); } psend = ct; } @@ -1405,9 +1404,9 @@ static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local if (local) { struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) - ipmr_queue_xmit(skb2, cache, psend); + ipmr_queue_xmit(net, skb2, cache, psend); } else { - ipmr_queue_xmit(skb, cache, psend); + ipmr_queue_xmit(net, skb, cache, psend); return 0; } } @@ -1488,7 +1487,7 @@ int ip_mr_input(struct sk_buff *skb) return -ENODEV; } - ip_mr_forward(skb, cache, local); + ip_mr_forward(net, skb, cache, local); read_unlock(&mrt_lock); @@ -1602,11 +1601,11 @@ drop: #endif static int -ipmr_fill_mroute(struct sk_buff *skb, struct mfc_cache *c, struct rtmsg *rtm) +ipmr_fill_mroute(struct net *net, struct sk_buff *skb, struct mfc_cache *c, + struct rtmsg *rtm) { int ct; struct rtnexthop *nhp; - struct net *net = mfc_net(c); u8 *b = skb_tail_pointer(skb); struct rtattr *mp_head; @@ -1686,7 +1685,7 @@ int ipmr_get_route(struct net *net, if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY)) cache->mfc_flags |= MFC_NOTIFY; - err = ipmr_fill_mroute(skb, cache, rtm); + err = ipmr_fill_mroute(net, skb, cache, rtm); read_unlock(&mrt_lock); return err; } -- 2.39.3